I use the sprung saddles (B67 I think) on my commuter hybrid and my folding bike - it helps smooth the bumps out on the road and makes the ride more comfortable. I use the regular B17 on my road bike - because I have it and it fits me well. A lot of people do not use sprung saddles on road bikes - I think the reason is for weight issues and aesthetics. I did not put one on my road bike because I started with the middle of the road vanilla approach - B17 being the most popular saddle and also because I just did not think about sprung for some reason. No real reason for me to worry about saddle weight (or aesthetics) until I lose 40 lbs.